linux-kernel - Re: [PATCH v15 2/4] PCI/DOE: Rename Discovery Response Data Object Contents to type

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Message-ID: <cbc54dfb-6699-ae15-f40e-d3b5969fc806@linux.intel.com>
Date: Wed, 7 Aug 2024 11:03:38 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: Alistair Francis <alistair23@...il.com>
cc: bhelgaas@...gle.com, linux-pci@...r.kernel.org, 
    Jonathan.Cameron@...wei.com, Lukas Wunner <lukas@...ner.de>, 
    alex.williamson@...hat.com, christian.koenig@....com, kch@...dia.com, 
    Greg Kroah-Hartman <gregkh@...uxfoundation.org>, logang@...tatee.com, 
    LKML <linux-kernel@...r.kernel.org>, chaitanyak@...dia.com, 
    rdunlap@...radead.org, Alistair Francis <alistair.francis@....com>
Subject: Re: [PATCH v15 2/4] PCI/DOE: Rename Discovery Response Data Object
 Contents to type

On Wed, 7 Aug 2024, Alistair Francis wrote:

> PCIe r6.1 (which was published July 24) describes a "Vendor ID", a
> "Data Object Type" and "Next Index" as the fields in the DOE
> Discovery Response Data Object. The DOE driver currently uses
> both the terms type and prot for the second element.
> 
> This patch renames all uses of the DOE Discovery Response Data Object
> to use type as the second element of the object header, instead of
> type/prot as it currently is.
> 
> Signed-off-by: Alistair Francis <alistair.francis@....com>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> ---

> diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
> index 94c00996e633..795e49304ae4 100644
> --- a/include/uapi/linux/pci_regs.h
> +++ b/include/uapi/linux/pci_regs.h
> @@ -1146,9 +1146,12 @@
>  #define PCI_DOE_DATA_OBJECT_DISC_REQ_3_INDEX		0x000000ff
>  #define PCI_DOE_DATA_OBJECT_DISC_REQ_3_VER		0x0000ff00
>  #define PCI_DOE_DATA_OBJECT_DISC_RSP_3_VID		0x0000ffff
> -#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL		0x00ff0000
> +#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_TYPE		0x00ff0000

This change (removal of the old define) is inside UAPI header, so it does 
seem something that is not allowed.

>  #define PCI_DOE_DATA_OBJECT_DISC_RSP_3_NEXT_INDEX	0xff000000
>  
> +/* Deprecated old name, replaced with PCI_DOE_DATA_OBJECT_DISC_RSP_3_TYPE */
> +#define PCI_DOE_DATA_OBJECT_DISC_RSP_3_PROTOCOL		PCI_DOE_DATA_OBJECT_DISC_RSP_3_TYPE
> +
>  /* Compute Express Link (CXL r3.1, sec 8.1.5) */
>  #define PCI_DVSEC_CXL_PORT				3
>  #define PCI_DVSEC_CXL_PORT_CTL				0x0c
> 

-- 
 i.